Quiz 8: Biological Control & Cultural Practices Insights

Quiz 8 Due May 7 at 11:59pm Points 30 Questions 10 Available May 2 at 10am - May 7 at 11:59pm Time Limit None Allowed Attempts 3 Instructions Attempt History Attempt Time Score KEPT Attempt 2 less than 1 minute 27 out of 30 LATEST Attempt 2 less than 1 minute 27 out of 30 Attempt 1 8 minutes 18 out of 30  Correct answers are hidden. Score for this attempt: 27 out of 30 Submitted May 5 at 8:47pm This attempt took less than 1 minute. Quiz 8 Due Sunday, May 7th (05/07) @ 11:59 PM This quiz covers Biological control + cultural practices (lectures 26-27). The quiz has 10 questions, each worth 3 points for a total of 30 points . Everyone gets 3 attempts. Please, read each question carefully and answer to the best of your knowledge. Take the Quiz Again 3 / 3 pts Question 1

"Cultural practices is the combination of all possible management approaches to reduce the pathogen spread" True False 3 / 3 pts Question 2 Overhead irrigation is not recommended because: Most plants do not need water on the leaves Bacteria can survive and spread in the air Increasing leaf wetness may lead to infection Reduces the plant defense systems 3 / 3 pts Question 3 Biological control agents used for controlling plant disease serve that function only by directly inhibiting plant pathogens, i.e. via antagonism, competition and parasitism. True False

3 / 3 pts Question 4 Avoiding treatment of soils with broad spectrum biocidal chemical or extremely high levels of heat is considered to be a form of biological control even though not biocontrol agents are added to the soil. True False 3 / 3 pts Question 5 What role do Bacillus and Trichoderma play in plant disease? They cause disease in wide range of plants They are the microbes that are mostly commonly used in products for controlling plant disease They are mycorrhizal symbionts with plants that can enhance plant vigor through phosphorus and water uptake They are the biological control agents responsible for the recovery of chestnut blight cankers

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3 / 3 pts Question 6 Under what set of conditions, relative to chemical fungicides, would you expect the use biological control agents NOT to be justified? Use of biocontrol agents to replace effective chemical fungicides Combining biocontrol agents with fungicides to broaden the range of pathogens controlled or to increase total disease control effectiveness Rotating or combining biocontrol agents with single-site of action fungicides to prevent development of pathogen resistance to the fungicides Use of biocontrol agents to control diseases for which there are no effective fungicides available or fungicides can't be used 0 / 3 pts Question 7 Incorrect Incorrect When it comes to crop rotation, what are the main considerations to keep in mind? Soil pH and fertility Other practices that may influence rotation Host and pathogen interactions Host family and rotation cycles

Water availability and microclimate 3 / 3 pts Question 8 This method refers to the removal of infected plants (or plant parts) in small-scale agricultural systems: Tillage Sanitation Roguing Rotation 3 / 3 pts Question 9 Induced Plant Resistance is considered a type of biological control if: Activated by a pathogen Activated by a biocontrol agent Activated by an abiotic factor Activated at the right time

3 / 3 pts Question 10 This is one of the disadvantages of using biological control as a management strategy: Reduces soil quality and fertility Resistance develops overtime in pathogen populations Does not rely on other management strategies Low adoption and general skepticism Promotes pathogen survival and infection Quiz Score: 27 out of 30

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Quiz 8_ PLANT PATHOGENS&DISEASE PLPT210 SEC 001 Spring 2023

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